Ionia Weather Forecast

    • 63
    • 82

    Mostly Sunny

    • 68
    • 87

    Slight Chance Thunderstorms

    • 67
    • 86

    Rain Showers

    • 64
    • 81

    Rain Showers Likely

    • 66
    • 83

    Chance Thunderstorms

    • 67
    • 85

    Chance Rain Showers

Today 4 Aug Ontario

Sunny. Patchy fog this morning. Highs Ranging from the upper 70s on the Hilltops to the lower 80s across the lower Elevations. Light southwest Winds.

Tonight 4 Aug Ontario

Mainly clear. Lows in the lower 60s. Light south Winds.

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Ionia Temperature Statistics

August Temperature

Rochester, Greater Rochester International Airport (15.5 miles)

  • Lowest 1 August, 2026

    64 °F

  • Average August

    74.5 °F

  • Highest 1 August, 2026

    84.9 °F

Climate (2021–2026)

Rochester, Greater Rochester International Airport (15.5 miles)

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  • Average Low 2021–2026

    42.3 °F

  • Average 2021–2026

    50.8 °F

  • Average High 2021–2026

    59.6 °F
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